1) 9x+4y=11
3x-10y=-2 > 9x-30y=-6
9x+4y=11
-(9x-30y=-6)
34y=17
y=1/2
9x+4(1/2)=11
9x=9
x=1
2) 4x+3y=21 > 8x+6y=42
5x+2y=21 > 15x+6y=63
8x+6y=42
-(15x+6y=63)
-7x=-21
x=3
4(3)+3y=21
3y=9
y=3
you didn't give me the choices, so i will just give you the graph so you can look at your choices and choose the right one.